Antitheft alarm system for a car and a car stereo having a removable panel
AssigneePioneer Electronic Corporation
InventorDamian Howard
Life of this patent
Estimating the term…
Abstract
A car stereo has a removable panel attached to a body of the car stereo, the panel having a plurality of operation buttons for operating the car stereo. An alarm device is provided in a motor vehicle. A first detector is provided for detecting removing of the panel from the body, and a second detector is provided for detecting turning on of an ignition switch of the motor vehicle. A third detector is provided for detecting opening of a door of the motor vehicle. At lapse of a predetermined first period of time after the detection of the door open, the alarm device is operated unless detection of attaching of the panel and turning on of the ignition switch.
Claims4
A car stereo for a motor vehicle, the car stereo having a removable panel attached to a body of the car stereo, the panel having a plurality of operation buttons for operating the car stereo, comprising:
- an alarm device provided in the motor vehicle;
- first detector means for detecting removing of the panel from the body and for producing a removing signal and an attaching signal dependent on the removing and attaching of the panel;
- second detector means for detecting operation of an ignition switch of the motor vehicle and for producing a switch ON signal and a switch OFF signal;
- third detector means for detecting opening of a door of the motor vehicle and for producing a door open signal;
- first determining means for determining lapse of a predetermined first period of time after the door open signal and for producing an alarm signal unless at least either of the attaching signal or the switch ON signal is generated;
- and
- alarm operating means responsive to the alarm signal for operating the alarm device.
Dependencies are inferred from the claim text.